Pressure gauge



May-16, 1933. J. E. ESHBAUGH in {7 W a u a "I.

PRESSURE GAUGE Filed Nov. 15. 1928 Patented May 16, 1933 UNITED STATES PATENT OFFICE,

mssn E. ESHBAUGH, or FLIN1, MICHIGAN ranss'nnn GAUGE Application filed November lti, 1928, Serial No. 319,561. v

This invention relates to gauges and has particular reference to the link which connects the pressure responsive member to the pointer operating mechanism. The invention is illustrated in connect-ion with a gaugeof the Bourdon tube type, although it is applicable to othjeImtypesof gauges. The free end of the Bourdon tube is usually provided with a wing or attaching portionwhile the pointer-swinging mechanism is also provided with an arm or wing for the attachment of a link. The link interconnects the wing of the Bourdon tube with the arm of the swinging mechanism and in prior constructions use has been made of. a shouldered rivet which has been. passed through an opening in the link and a smaller opening in the wing of the Bourdontube to form a pivotal connection; It isan object of the present invention to improve and cheapen this construction.- I

The object of the invention is accomplished by pressing a knob, button or projection in the :wing attheend ofthe Bourdon tube and a similar button or projectionin the arm or wing of the pointer swinging mechanism. The side opposite the button is left hollow forming a recess or anindentation; The connecting link isprovided with similar buttons or projections, the button of the link resting ijnthe hollow portion'of buttons of the, arm and wing. Eachend of the link is bent around on itself and contacts with the button or projection on the wing of the tube or arm of the pointer swinging mechanism tohold the parts in their relative inter-rela tion and assist in forming apivotal connection. a i m I As a modification the wings may be providedwith holes andthe link with tion which fits into thehole.

Referring to the drawingt I Fig. 1 shows a faceview of the Bourdon gauge with the cover removed and the casing and dial'broken away to illustrate the construction. I i i 'Fig. 2 is an enlarged detailedview of the structure of the invention taken on the line 2-2 of Fig.1.

a projec I Fig. i a perspective view of the str licture' ofFigZ.

"Fig. 4 is an enlarged sectional View of the line Ho f Fig, 3, the section being takenthrough oneofthe pivotal jcjonnP;citions. 0

\ Figs. 5 andfi'are modificationsof the struc-r ture shown in Fig.4. y I Referring to hedrawing; the numeralfl indicates the casing of a gauge. In the easing there is mounted the base plate a to which there is secured the stud or socket 6 in which there is mounted an end 8 of the Bourdon tube 10. The opposite; end 12 ofthetube-is free and has secured thereto the end connectlon crowing 14; having the angularly bent port1on 16 which is provided with a praise-1 tion or button l 8, prjes's ed from one side. button extends beyond the plane of-the' pee tion 16 and forms a'rece's's'or indentation on the opposite side. 7 v

The gauge is provided with the usual pointer mo'vin over the dial: 2 4. The pointer is actuate by the pointer-swinging mechanism indicated as awholej at The pointer-swinging mechanism includes the sector 28ha'v'ing the arm or wingi3f0, the end ofwhich is provided with a butto'n o'r projection 32 in all respects similar to the button ,18 on the wing14. Q 7 Connecting the w 'ng 14- withfthe wing; or arm 30 is a link 34. ,One end ofthe link 34 is provided with t a button or projection 36 which conforms to the button or projection 18" of the wing 14, while theotherend has a button or'projection 35 which conforms V tothe button or projection 32" on' the armor wlng 30, As will be seen from Fi "s.; 2,4 and 6, the projecting-portion of the ttons 35 and 36 extend into the recesses of the buttons32 and 18 respectively. f 1

Referring to Figs. 2; 3 and 4 it will noted that each; end of the link 3t is 'IB versely bent as shown at 38 and 4:0,,thebent portions projecting under and contacting with the tip or peak of the buttons 18 and 32 on the wing l l and arm 30 respectively, Thepurpose of these bent-over portionsis to maintain the link inposition on the wing l t and arm 30; and to aid informing the pivotal connection between the Bourdon tubev 10 and the pointer-swinging mechanism 26.

Referring to the structure of Fig. 5, it will be noted that the angular portion 16 of the wing 14 instead of being provided with a button 18 has a hole 42 punched therein, while the end of the link 34 is provided with a rounded projection 18 which enters into the hole 42. A similar connection is provided at the other end of the link. The link pivots about the projection 18 in the opening 42.

Referring to the structure of Fig. 6, it will be seen that it is in all respects similar to Fig. 4 except that the bent portion 38 is also provided with a button or projection 44 conforming to the buttons 18 and '36 on the wing 14 and link 34 respectively..

The operation of the Bourdon tube gauge isjconventional andsimilar in all respects to Bourdon tube gauges now in use. As the Bourdon tube expands it will pull on the link 34 which in turn will pull the arm of the sector 28. A pivotal movement at the connecting point of the link will be allowed due to the seating ofthe tip or peak of i the projection of the buttons on. the link 34 in the recesses formed by the buttons on the wing and arm respectively.

The present invention has eliminated the usual rivet and the opening which it was necessary to punch in the link and its connections. The structure is much cheaper and much easier to assemble and equally as efi'ective as prior constructions;

I claim: 5 1. In a gauge, a Bourdon tube having a connecting wingat its free end, a pointer swinging mechanism having a connecting wing portion,pressed-out portions formed on said wings, alink'having pivotal engagement with said pressed-out portions and connect ing saidtube and mechanism, and means to hold said link in position.- Y 7 V "2. In a' gauge, 'a 'Bourdon tube having a connecting wing at its free end, a pointer swinging mechanism having a connecting wing portiomknobs or buttons pressed from said wings'leavingindentations on the opposite side, a link; connecting said tube and mechanism and having a pivotal connection withv said wings at said knobs or buttons, and means to hold said link in position.

1 -3. Ina gauge, a pressure responsive memher havinga connecting element secured thereto, aknob or button pressed into said 7 element leaving an indentation on the opposite side, a pointer swinging mechanism having an attaching arm, a knob or button pressed into said arm leaving an indentation on the opposite side, a link connecting said member and mechanism in operative relation, and'a knob or button pressed from each end of said vlink and conforming to the indentations in the element and arm, and means to retain said buttons in said indentations for pivotal engagement.

4. In a gauge, a Bourdon tube having a connecting wing at its free end, a pointer swinging mechanism having a connecting wing portion, pressed-out portions formed on said wings, a link connecting said tube and mechanism and havingpressed-out portions conforming to the pressed-out portions of said wings, and means to hold said pressedout portions together to form a' pivotal connection.

5. .In a gauge, a Bourdon tube having a connecting wing at its free end, a pointer swinging mechanism having a connecting wing portion, knobs or buttons pressed from said Wings leaving indentations on the opposite side, and a link connecting said tube and mechanism and having knobs or buttons pressed therefrom conforming to the indentations in said wings, and means to hold the knobs of the link in the indentations of the wing to form a pivotal connection. v

6. In a gauge, a pressure responsive mem: her having a connecting element secured thereto, a knob or button pressed into said elementleavingan indentation on the opposite side, a pointer swinging mechanism hava ing an attaching arm, a knob or button pressed into said arm leaving an indentation on the oppositeside, a link connecting said member and mechanism in operative relation, a knob or button pressedqfrom each end of said link and conforming to the indentations in the element and arm and forming therewith piv otal connections, and bent-over portions on the ends of said link'comprising a part of said connections.

7 In a gauge, a pressure responsive member, a wing; on said member, a pointer swinging mechanism, an arm on said mechanism, a link between said wing and arm to operate said mechanism from said member, a connection between said link and, said wing and 7 arm, said connection formed ofparts of said link, wing and arm,and including bent over ends on said link engaging over and around saldwing and arm'to hold said link in position. 7 r

8. In a gauge, a Bourdon tubehaving a connecting wlng at its free end, a pointer swinging mechanismhaving a connecting wing portion, knobs .orbuttons pressed from said wings leaving indentations on the opposite side, a link connecting said tube and mechanism and having a pivotal connection with said wings at said knobs or buttons, and bent ends on said linkengaging over said wings to hold said link in position.

9. In a gauge, a Bourdon tube having a connectingwingat its free end, a pointer swinging mechanism having a connecting wing portion, knobs or buttons pressedfrom said wingsleaving indentations on the opposite side, and a' link connectingsaid tube and mechanism and having knobs or buttons pressed therefrom conforming to the indentations in said wings to form a pivotal connection with said wings at said knobs or buttons, and bent ends on said link engaging over said wings to hold said link in position.

10. In a gauge, a pressure responsive memher, a wing on said member, a pointer swinging mechanism, an arm on said mechanism, sald wing and arm having indentations, and an articulation connector link between said wing and arm having a flattened end doubled upon itself and indented to form a point of articulation with the indentations of the wing; and arm.

In testimony whereof I aflix my signature.

JESSE E. ESHBAUGH. 

